///<summary>
/// Displays a configurable paging control for instances of PagedList.
///</summary>
///<param name = "html">This method is meant to hook off HtmlHelper as an extension method.</param>
///<param name = "list">The PagedList to use as the data source.</param>
///<param name = "generatePageUrl">A function that takes the page number of the desired page and returns a URL-string that will load that page.</param>
///<param name = "options">Formatting options.</param>
///<returns>Outputs the paging control HTML.</returns>
public static MvcHtmlString PagedListPager(this System.Web.Mvc.HtmlHelper html,
IPagedList list,
Func <int, string> generatePageUrl,
PagedListRenderOptions options)
{
var listItemLinks = new List <TagBuilder>();
//first
if (options.DisplayLinkToFirstPage)
{
listItemLinks.Add(First(list, generatePageUrl, options.LinkToFirstPageFormat));
}
//previous
if (options.DisplayLinkToPreviousPage)
{
listItemLinks.Add(Previous(list, generatePageUrl, options.LinkToPreviousPageFormat));
}
//text
if (options.DisplayPageCountAndCurrentLocation)
{
listItemLinks.Add(PageCountAndLocationText(list, options.PageCountAndCurrentLocationFormat));
}
//text
if (options.DisplayItemSliceAndTotal)
{
listItemLinks.Add(ItemSliceAndTotalText(list, options.ItemSliceAndTotalFormat));
}
//page
if (options.DisplayLinkToIndividualPages)
{
//calculate start and end of range of page numbers
var start = 1;
var end = list.PageCount;
if (options.MaximumPageNumbersToDisplay.HasValue && list.PageCount > options.MaximumPageNumbersToDisplay)
{
var maxPageNumbersToDisplay = options.MaximumPageNumbersToDisplay.Value;
start = list.PageNumber - maxPageNumbersToDisplay / 2;
if (start < 1)
{
start = 1;
}
end = maxPageNumbersToDisplay;
if ((start + end - 1) > list.PageCount)
{
start = list.PageCount - maxPageNumbersToDisplay + 1;
}
}
//if there are previous page numbers not displayed, show an ellipsis
if (options.DisplayEllipsesWhenNotShowingAllPageNumbers && start > 1)
{
listItemLinks.Add(Ellipses(options.EllipsesFormat));
}
foreach (var i in Enumerable.Range(start, end))
{
//show delimiter between page numbers
if (i > start && !String.IsNullOrWhiteSpace(options.DelimiterBetweenPageNumbers))
{
listItemLinks.Add(WrapInListItem(options.DelimiterBetweenPageNumbers));
}
//show page number link
listItemLinks.Add(options.FunctionToDisplayEachPageNumber == null
? Page(i, list, generatePageUrl, options.LinkToIndividualPageFormat)
: Page(i, list, generatePageUrl, options.FunctionToDisplayEachPageNumber));
}
//if there are subsequent page numbers not displayed, show an ellipsis
if (options.DisplayEllipsesWhenNotShowingAllPageNumbers && (start + end - 1) < list.PageCount)
{
listItemLinks.Add(Ellipses(options.EllipsesFormat));
}
}
//next
if (options.DisplayLinkToNextPage)
{
listItemLinks.Add(Next(list, generatePageUrl, options.LinkToNextPageFormat));
}
//last
if (options.DisplayLinkToLastPage)
{
listItemLinks.Add(Last(list, generatePageUrl, options.LinkToLastPageFormat));
}
//append class to first item in list?
if (!String.IsNullOrWhiteSpace(options.ClassToApplyToFirstListItemInPager))
{
listItemLinks.First().AddCssClass(options.ClassToApplyToFirstListItemInPager);
}
//append class to last item in list?
if (!String.IsNullOrWhiteSpace(options.ClassToApplyToLastListItemInPager))
{
listItemLinks.Last().AddCssClass(options.ClassToApplyToLastListItemInPager);
}
//append classes to all list item links
foreach (var li in listItemLinks)
{
foreach (var c in options.LiElementClasses ?? Enumerable.Empty <string>())
{
li.AddCssClass(c);
}
}
//collapse all of the list items into one big string
var listItemLinksString = listItemLinks.Aggregate(
new StringBuilder(),
(sb, listItem) => sb.Append(listItem.ToString()),
sb => sb.ToString()
);
var ul = new TagBuilder("ul")
{
InnerHtml = listItemLinksString
};
foreach (var c in options.UlElementClasses ?? Enumerable.Empty <string>())
{
ul.AddCssClass(c);
}
var outerDiv = new TagBuilder("div");
foreach (var c in options.ContainerDivClasses ?? Enumerable.Empty <string>())
{
outerDiv.AddCssClass(c);
}
outerDiv.InnerHtml = ul.ToString();
return(new MvcHtmlString(outerDiv.ToString()));
}
///<summary>
/// Displays a configurable paging control for instances of PagedList.
///</summary>
///<param name = "html">This method is meant to hook off HtmlHelper as an extension method.</param>
///<param name = "list">The PagedList to use as the data source.</param>
///<param name = "generatePageUrl">A function that takes the page number of the desired page and returns a URL-string that will load that page.</param>
///<param name = "options">Formatting options.</param>
///<returns>Outputs the paging control HTML.</returns>
public static MvcHtmlString PagedListPager(this System.Web.Mvc.HtmlHelper html,
IPagedList list,
Func<int, string> generatePageUrl,
PagedListRenderOptions options)
{
var listItemLinks = new List<TagBuilder>();
//first
if (options.DisplayLinkToFirstPage)
listItemLinks.Add(First(list, generatePageUrl, options.LinkToFirstPageFormat));
//previous
if (options.DisplayLinkToPreviousPage)
listItemLinks.Add(Previous(list, generatePageUrl, options.LinkToPreviousPageFormat));
//text
if (options.DisplayPageCountAndCurrentLocation)
listItemLinks.Add(PageCountAndLocationText(list, options.PageCountAndCurrentLocationFormat));
//text
if (options.DisplayItemSliceAndTotal)
listItemLinks.Add(ItemSliceAndTotalText(list, options.ItemSliceAndTotalFormat));
//page
if (options.DisplayLinkToIndividualPages)
{
//calculate start and end of range of page numbers
var start = 1;
var end = list.PageCount;
if (options.MaximumPageNumbersToDisplay.HasValue && list.PageCount > options.MaximumPageNumbersToDisplay)
{
var maxPageNumbersToDisplay = options.MaximumPageNumbersToDisplay.Value;
start = list.PageNumber - maxPageNumbersToDisplay / 2;
if (start < 1)
start = 1;
end = maxPageNumbersToDisplay;
if ((start + end - 1) > list.PageCount)
start = list.PageCount - maxPageNumbersToDisplay + 1;
}
//if there are previous page numbers not displayed, show an ellipsis
if (options.DisplayEllipsesWhenNotShowingAllPageNumbers && start > 1)
listItemLinks.Add(Ellipses(options.EllipsesFormat));
foreach (var i in Enumerable.Range(start, end))
{
//show delimiter between page numbers
if (i > start && !String.IsNullOrWhiteSpace(options.DelimiterBetweenPageNumbers))
listItemLinks.Add(WrapInListItem(options.DelimiterBetweenPageNumbers));
//show page number link
listItemLinks.Add(options.FunctionToDisplayEachPageNumber == null
? Page(i, list, generatePageUrl, options.LinkToIndividualPageFormat)
: Page(i, list, generatePageUrl, options.FunctionToDisplayEachPageNumber));
}
//if there are subsequent page numbers not displayed, show an ellipsis
if (options.DisplayEllipsesWhenNotShowingAllPageNumbers && (start + end - 1) < list.PageCount)
listItemLinks.Add(Ellipses(options.EllipsesFormat));
}
//next
if (options.DisplayLinkToNextPage)
listItemLinks.Add(Next(list, generatePageUrl, options.LinkToNextPageFormat));
//last
if (options.DisplayLinkToLastPage)
listItemLinks.Add(Last(list, generatePageUrl, options.LinkToLastPageFormat));
//append class to first item in list?
if (!String.IsNullOrWhiteSpace(options.ClassToApplyToFirstListItemInPager))
listItemLinks.First().AddCssClass(options.ClassToApplyToFirstListItemInPager);
//append class to last item in list?
if (!String.IsNullOrWhiteSpace(options.ClassToApplyToLastListItemInPager))
listItemLinks.Last().AddCssClass(options.ClassToApplyToLastListItemInPager);
//append classes to all list item links
foreach(var li in listItemLinks)
foreach (var c in options.LiElementClasses ?? Enumerable.Empty<string>())
li.AddCssClass(c);
//collapse all of the list items into one big string
var listItemLinksString = listItemLinks.Aggregate(
new StringBuilder(),
(sb, listItem) => sb.Append(listItem.ToString()),
sb=> sb.ToString()
);
var ul = new TagBuilder("ul")
{
InnerHtml = listItemLinksString
};
foreach (var c in options.UlElementClasses ?? Enumerable.Empty<string>())
ul.AddCssClass(c);
var outerDiv = new TagBuilder("div");
foreach(var c in options.ContainerDivClasses ?? Enumerable.Empty<string>())
outerDiv.AddCssClass(c);
outerDiv.InnerHtml = ul.ToString();
return new MvcHtmlString(outerDiv.ToString());
}
